tools/testing/selftests/bpf/progs/test_lookup_and_delete.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_lookup_and_delete.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_lookup_and_delete.c
Extension
.c
Size
547 bytes
Lines
27
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0

#include "vmlinux.h"
#include <bpf/bpf_helpers.h>

__u32 set_pid = 0;
__u64 set_key = 0;
__u64 set_value = 0;

struct {
	__uint(type, BPF_MAP_TYPE_HASH);
	__uint(max_entries, 2);
	__type(key, __u64);
	__type(value, __u64);
} hash_map SEC(".maps");

SEC("tp/syscalls/sys_enter_getpgid")
int bpf_lookup_and_delete_test(const void *ctx)
{
	if (set_pid == bpf_get_current_pid_tgid() >> 32)
		bpf_map_update_elem(&hash_map, &set_key, &set_value, BPF_NOEXIST);

	return 0;
}

char _license[] SEC("license") = "GPL";

Annotation

Implementation Notes